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Children, projection, & source rules are unambiguous.

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This commit is contained in:
Rob Rix 2017-08-03 20:51:46 -04:00
parent e9c61048ec
commit d5749545ce
1 changed files with 4 additions and 4 deletions
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8
src/Data/Syntax/Assignment.hs
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@ -269,11 +269,11 @@ runAssignment toNode source = (\ assignment state -> go assignment state >>= req
run assignment yield initialState = maybe (anywhere Nothing) (atNode . F.project) (listToMaybe (stateNodes state))
where atNode node = case assignment of
Location -> yield (nodeLocation (toNode node)) state
Project projection -> yield (projection node) state <> anywhere (Just node)
Source -> yield (Source.sourceBytes (Source.slice (nodeByteRange (toNode node)) source)) (advance state) <> anywhere (Just node)
Children child -> (do
Project projection -> yield (projection node) state
Source -> yield (Source.sourceBytes (Source.slice (nodeByteRange (toNode node)) source)) (advance state)
Children child -> do
(a, state') <- go child state { stateNodes = toList node } >>= requireExhaustive
yield a (advance state' { stateNodes = stateNodes state })) <> anywhere (Just node)
yield a (advance state' { stateNodes = stateNodes state })
Choose choices _ | Just choice <- IntMap.lookup (fromEnum (nodeSymbol (toNode node))) choices -> yield choice state
_ -> anywhere (Just node)